rename CloseError() to Interrupt()

common/interfaces.go

@@ -6,6 +6,11 @@ type Closable interface {
 	Close() error
 }
 
+// Interruptible is an interface for objects that can be stopped before its completion.
+type Interruptible interface {
+	Interrupt()
+}
+
 // Close closes the obj if it is a Closable.
 func Close(obj interface{}) error {
 	if c, ok := obj.(Closable); ok {
@@ -14,6 +19,15 @@ func Close(obj interface{}) error {
 	return nil
 }
 
+// Interrupt calls Interrupt() if object implements Interruptible interface, or Close() if the object implements Closable interface.
+func Interrupt(obj interface{}) error {
+	if c, ok := obj.(Interruptible); ok {
+		c.Interrupt()
+		return nil
+	}
+	return Close(obj)
+}
+
 // Runnable is the interface for objects that can start to work and stop on demand.
 type Runnable interface {
 	// Start starts the runnable object. Upon the method returning nil, the object begins to function properly.